Billboard's new cover story focuses on the King of Pop himself, Michael Jackson, going behind the scenes with the super-producers who sifted through nearly two-decades of MJ's studio outtakes in an attempt to produce what they hope will be a posthumous hit record, Xscape (out May 13). Antonio "L.A." Reid, Timbaland, Rodney Jerkins and J-Roc -- the Xscape team -- take Billboard into the making of the album, available in an expanded edition that includes a new Justin Timberlake-MJ duet "Love Never Felt So Good."

Check back Monday to get the full story. Until then, here are five things we learned about the journey to Michael Jackson's Xscape.

There was no shortage of material. Producers selected 24 possibilities for Xscape. They in turn narrowed the field to 20, which were edited down to about 14. Eight will be on the album, though several more were prepared (a deluxe edition will also feature the original tracks). The choices are not exactly surprises, though the omissions may be. The tracks that Jackson cut with Queen's Freddie Mercury in 1983 are not on Xscape, although both Brian May and Roger Taylor of Queen spoke about working on them last year. And though a version of "Slave to the Rhythm" featuring Justin Bieber leaked last August (supported by a series of Bieber tweets), you won't hear it on Xscape.

Hardcore fans will likely recognize the tracks. ... But that doesn't mean the producers had heard them before. Timbaland and Stargate's Mikkel Eriksen both began by listening to the source material that Reid presented, and both quickly decided to forgo the instrumental tracks and work with only Jackson's vocals and a few stray noises picked up by the microphone. "You can hear his foot in the booth when he's singing, and his fingers snapping," says Jerkins.

MJ was relentless in the studio. During the original sessions for "Slave to the Rhythm" in 1989, Jackson recorded the vocal 24 times. "And it was not once and fix the bad note," says Reid, who worked on the base track with Babyface. "No, he sang the song from top to bottom 24 times without a bathroom break, without a water break, without a 'Give me a moment.' He would sing the song and say, 'OK, give me another track, I can do it better,' and he'd do it again. 'I can nail this. Give me another track,' and he'd do it again."

L.A. Reid tried to sign Jackson to Island Def Jam. "He said, 'I don't want another hit, I don't want to just make another record. I want to do something great. If it can't be great, if it can't be groundbreaking, if it can't be massive, if you're not as committed as I am, then we shouldn't do it. But if you commit to me, I promise I'll commit to you." It wasn't to be. Jackson instead signed a short-lived deal withSheik Abdulla bin Hamad Al Khalifa, the prince of Bahrain.

MJ really wanted to work with Stargate. Jackson was looking to collaborate with the Norwegian production duo Stargate — Mikkel Eriksen and Tor Hermansen — known for their hits with Rihanna and Katy Perry. The singer was a fan of their songs for Ne-Yo, and he met with them at the Midtown Manhattan Chinese restaurant Mr. K's to discuss future projects. "Just the two of us, and managers, and Blanket was there as well," says Eriksen. "Down in the basement."

This article first appeared on Billboard.com. Return to Billboard.com on Monday morning for the full cover story.